Environmental Radio Noise Generated by Cities and Towns

由“附带”发射器（如光）产生的无线电噪声 交换机、计算机、广播和电视接收机，以及非 许可的低功率无线电设备，例如无绳电话， 车库门开启器等产生严重的干扰问题 无线电频谱的其他用户。 噪音知识 由附带和非持牌散热器产生的水平是 重要的是，例如对于干扰减少的规划 无线电观测站的设计和选址， 其他通信系统也是如此。噪声测量 由不同社区产生的水平几乎不存在， 然而. 私人侦探建议从以下地点获得这些测量结果： 飞机，在30至600兆赫的频率范围内， 大概吧 目前的建议是延长一年 去年提出的工作。 扩展将使P.I.研究季节性和周期性 噪音水平的变化，确定一些主要的 噪声的贡献者，并确定聚合效应是否可以 可以从单个来源的知识中预测。

Radio noise generated by "incidental" transmitters such as light switches, computers, radio and television receivers, and by non- licensed low power radio devices, e.g. cordless telephones, garage door openers, etc. create serious interference problems for other users of the radio spectrum. Knowledge of the noise level generated by incidental and non-licensed radiators is important, for example for the planning of interference reduction strategies, the design and siting of radio observatories and other communication systems as well. Measurements of the noise level generated by different communities are almost non-existent, however. The P.I has proposed to obtain such measurements from aircraft, within the 30 to 600 MHz frequency range, approximately. The present proposal is for a one year extension of the work proposed last year. The extension will enable the P.I. to study seasonal and cyclical variations of the noise level, identify some of the main contributors to the noise, and determine if aggregate effects can be predicted from the knowledge of individual sources.